20 research outputs found
Visualization-2.mp4
3D reconstruction of a see-through light field display showing field of view and paralla
Visualization-3.mp4
3D reconstruction of a see-through light field display depth focus change
Visualization-1.mp4
3D reconstruction of a see-through light field display showing field of view and parallax
Fast calculation method for computer-generated cylindrical hologram based on wave propagation in spectral domain
View synthesis from sparse camera array for pop-out rendering on hologram displays
A hologram of a scene can be digitally created by using a large set of images of that scene. Since capturing such a large amount is infeasible to accomplish, one may use view synthesis approaches to reduce the number of cameras and generate the missing views. We propose a view interpolation algorithm that creates views inside the scene, based on a sparse set of camera images. This allows the objects to pop out of the holographic display. We show that our approach outperforms existing view synthesis approaches and show the applicability on holographic stereograms.SCOPUS: cp.pinfo:eu-repo/semantics/publishe
Geometric Deformation Analysis of Ray-Sampling Plane Method for Projection-Type Holographic Display
Generation of InceāGaussian Beams Using Azocarbazole Polymer CGH
InceāGaussian beams, defined as a solution to a wave equation in elliptical coordinates, have shown great advantages in applications such as optical communication, optical trapping and optical computation. However, to ingress these applications, a compact and scalable method for generating these beams is required. Here, we present a simple method that satisfies the above requirement, and is capable of generating arbitrary InceāGaussian beams and their superposed states through a computer-generated hologram of size 1 mm2, fabricated on an azocarbazole polymer film. Other structural beams that can be derived from the InceāGaussian beam were also successfully generated by changing the elliptical parameters of the InceāGaussian beam. The orthogonality relations between different InceāGaussian modes were investigated in order to verify applicability in an optical communication regime. The complete python source code for computing the InceāGaussian beams and their holograms are also provided
Photoelectron Yield Spectroscopy and Transient Photocurrent Analysis for Triphenylamine-Based Photorefractive Polymer Composites
The photocurrent for poly(4-(dimethylamino)benzyl acrylate) (PDAA) photorefractive composites with (4-(diphenylamino)phenyl)methanol (TPAOH) photoconductive plasticizers was measured to be two orders of magnitude higher than that obtained with (2,4,6-trimethylphenyl)diphenylamine (TAA) photoconductive plasticizers. In this study, to determine the reason for the large difference in the photocurrent measured for PDAA photorefractive composites containing two different photoconductive plasticizers of TPAOH and TAA, the highest occupied molecular orbital (HOMO) level identical to the ionization potential (Ip) and the width of the density of states (DOS) were evaluated using photoelectron yield spectroscopy, and the transient photocurrent was analyzed using a two-trap model. The estimated hole mobility was also rationalized using a BƤssler formalism together with the energetic disorder of the width of the DOS and the positional disorder of the scattering situation for carrier hopping
Holographic Micromirror Array with Diffuse Areas for Accurate Calibration of 3D Light-Field Display
info:eu-repo/semantics/publishe